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Vulnerability Details :

CVE-2026-27589

Summary
Assigner-GitHub_M
Assigner Org ID-a0819718-46f1-4df5-94e2-005712e83aaa
Published At-24 Feb, 2026 | 16:30
Updated At-24 Feb, 2026 | 16:31
Rejected At-
Credits

Caddy vulnerable to cross-origin config application via local admin API /load (caddy)

Caddy is an extensible server platform that uses TLS by default. Prior to version 2.11.1, the local caddy admin API (default listen `127.0.0.1:2019`) exposes a state-changing `POST /load` endpoint that replaces the entire running configuration. When origin enforcement is not enabled (`enforce_origin` not configured), the admin endpoint accepts cross-origin requests (e.g., from attacker-controlled web content in a victim browser) and applies an attacker-supplied JSON config. This can change the admin listener settings and alter HTTP server behavior without user intent. Version 2.11.1 contains a fix for the issue.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:GitHub_M
Assigner Org ID:a0819718-46f1-4df5-94e2-005712e83aaa
Published At:24 Feb, 2026 | 16:30
Updated At:24 Feb, 2026 | 16:31
Rejected At:
▼CVE Numbering Authority (CNA)
Caddy vulnerable to cross-origin config application via local admin API /load (caddy)

Caddy is an extensible server platform that uses TLS by default. Prior to version 2.11.1, the local caddy admin API (default listen `127.0.0.1:2019`) exposes a state-changing `POST /load` endpoint that replaces the entire running configuration. When origin enforcement is not enabled (`enforce_origin` not configured), the admin endpoint accepts cross-origin requests (e.g., from attacker-controlled web content in a victim browser) and applies an attacker-supplied JSON config. This can change the admin listener settings and alter HTTP server behavior without user intent. Version 2.11.1 contains a fix for the issue.

Affected Products
Vendor
caddyserver
Product
caddy
Versions
Affected
  • < 2.11.1
Problem Types
TypeCWE IDDescription
CWECWE-352CWE-352: Cross-Site Request Forgery (CSRF)
Type: CWE
CWE ID: CWE-352
Description: CWE-352: Cross-Site Request Forgery (CSRF)
Metrics
VersionBase scoreBase severityVector
4.06.9MEDIUM
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:P
Version: 4.0
Base score: 6.9
Base severity: MEDIUM
Vector:
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:P
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://github.com/caddyserver/caddy/security/advisories/GHSA-879p-475x-rqh2
x_refsource_CONFIRM
https://github.com/caddyserver/caddy/releases/tag/v2.11.1
x_refsource_MISC
https://github.com/user-attachments/files/25079818/poc.zip
x_refsource_MISC
https://github.com/user-attachments/files/25079820/PR_DESCRIPTION.md
x_refsource_MISC
Hyperlink: https://github.com/caddyserver/caddy/security/advisories/GHSA-879p-475x-rqh2
Resource:
x_refsource_CONFIRM
Hyperlink: https://github.com/caddyserver/caddy/releases/tag/v2.11.1
Resource:
x_refsource_MISC
Hyperlink: https://github.com/user-attachments/files/25079818/poc.zip
Resource:
x_refsource_MISC
Hyperlink: https://github.com/user-attachments/files/25079820/PR_DESCRIPTION.md
Resource:
x_refsource_MISC
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:security-advisories@github.com
Published At:24 Feb, 2026 | 17:29
Updated At:24 Feb, 2026 | 21:52

Caddy is an extensible server platform that uses TLS by default. Prior to version 2.11.1, the local caddy admin API (default listen `127.0.0.1:2019`) exposes a state-changing `POST /load` endpoint that replaces the entire running configuration. When origin enforcement is not enabled (`enforce_origin` not configured), the admin endpoint accepts cross-origin requests (e.g., from attacker-controlled web content in a victim browser) and applies an attacker-supplied JSON config. This can change the admin listener settings and alter HTTP server behavior without user intent. Version 2.11.1 contains a fix for the issue.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary4.06.9MEDIUM
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Type: Secondary
Version: 4.0
Base score: 6.9
Base severity: MEDIUM
Vector:
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CPE Matches
Weaknesses
CWE IDTypeSource
CWE-352Primarysecurity-advisories@github.com
CWE ID: CWE-352
Type: Primary
Source: security-advisories@github.com
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://github.com/caddyserver/caddy/releases/tag/v2.11.1security-advisories@github.com
N/A
https://github.com/caddyserver/caddy/security/advisories/GHSA-879p-475x-rqh2security-advisories@github.com
N/A
https://github.com/user-attachments/files/25079818/poc.zipsecurity-advisories@github.com
N/A
https://github.com/user-attachments/files/25079820/PR_DESCRIPTION.mdsecurity-advisories@github.com
N/A
Hyperlink: https://github.com/caddyserver/caddy/releases/tag/v2.11.1
Source: security-advisories@github.com
Resource: N/A
Hyperlink: https://github.com/caddyserver/caddy/security/advisories/GHSA-879p-475x-rqh2
Source: security-advisories@github.com
Resource: N/A
Hyperlink: https://github.com/user-attachments/files/25079818/poc.zip
Source: security-advisories@github.com
Resource: N/A
Hyperlink: https://github.com/user-attachments/files/25079820/PR_DESCRIPTION.md
Source: security-advisories@github.com
Resource: N/A

Change History

0
Information is not available yet

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